When a visitor steps up to the interactive booth in the USA Pavilion, the image on the life-size vertical display scales to his or her general height. It then mirrors participants' gestures (lifting arms and legs, jumping, running in place) in life-size, high-definition 3D.

What's the point?

Highlighting GE's body-scanning technology, which is part of its Healthymagination initiative. Also, who can deny that it's fun seeing your own aerobicizing X-ray staring back at you?

Secretary of State Hillary Clinton and TV host Mario Lopez are
among the more famous Expo-goers who have hopped around in front of Visible You. The fair runs through October 31, so you if you manage to make it past the terrifying giant robo-baby that's greeting visitors, you might want to take a look.